Failure properties and stability monitoring of strip and column cemented gangue backfill bodies under uniaxial compression in constructional backfill mining

Ran, Hongyu; Yao, Guowei; Feng, Guorui; Li, Chun‐Qing

doi:10.1007/s11356-022-19336-2

Cited by 16 publications

(6 citation statements)

References 38 publications

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“…It can be seen that under the action of axial pressure, the CTB exhibits a variety of failure characteristics, such as single-crack splitting failure, multiple-cracks splitting failure, single-inclined-plane shear failure, and double-inclined-plane shear failure, which is consistent with most research conclusions on the failure characteristics of CTB [ 31 , 32 ]. The difference in this study is that a new failure characteristic, plastic tensile failure, appears in this experiment.…”

Section: Results and Analysissupporting

confidence: 83%

Comparative Analysis of Strength and Deformation Behavior of Cemented Tailings Backfill under Curing Temperature Effect

Pan

Zhou

Wang³

et al. 2022

Materials

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Mineral resources are increasingly being developed in cold and permafrost regions. However, the mechanical and physical properties of cemented tailings backfill (CTB) cured at normal temperature are no longer applicable. To clarify the reasons for this variability, a series of tests were performed. The mechanical properties of CTB with different cement–tailings ratios (CTR, 1:4, 1:8, 1:12, 1:16, and 1:20) were tested at different curing ages (3, 7 and 28 days) and curing temperatures (20 °C, 5 °C, −5 °C, and −20 °C). The differences of CTB in mechanical and physical properties under positive- and negative-temperature curing conditions were analyzed, and the microscopic failure process of CTB under negative-temperature curing conditions was discussed. The results revealed that the mechanical properties and deformation behavior of CTB under positive- and negative-temperature curing conditions were different. The frozen CTB had higher early strength than the standard-temperature curing condition (20 °C), and the lower the temperature, the higher the early strength. The low-temperature curing condition, on the other hand, was not beneficial to CTB’s long-term strength. The low-temperature curing condition was not conducive to the long-term strength of CTB. After yielding, strain hardening and strain softening appeared in the deformation behavior of frozen backfill, indicating ductility. In contrast to the typical-temperature curing condition, the frozen CTB showed a new failure pattern that has little relation to curing time or CTR. Furthermore, the failure process of frozen backfill was reviewed and studied, which was separated into four stages, and altered as the curing time increased. The results of this study can act as a guide for filling mines in permafrost and cold climates.

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Section: Results and Analysissupporting

confidence: 83%

Comparative Analysis of Strength and Deformation Behavior of Cemented Tailings Backfill under Curing Temperature Effect

Pan

Zhou

Wang³

et al. 2022

Materials

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“…Yang [9] revealed the influence of curing age on the dynamic mechanical properties and deformation and failure characteristics of backfill materials under intermediate strain rate. Ran [10] used acoustic emission technology to monitor the damage evolution of strip and column cemented gangue backfill bodies. Rafat [11,12] found that the tremendous anti-blast performance of the tubular column filled with concrete commonly known as the CFST column as a wise substitute for the conventional RC column.…”

Section: Introductionmentioning

confidence: 99%

Study on Bingham fractional damage model of backfill material under different moisture content conditions

Wang,

Yang,

et al. 2024

PLoS ONE

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Filling mining technology is an important representative technology to realize green and low-carbon mining. The backfill materials have distinct rheological characteristics under the long-term action of formation loads and groundwater seepage. In order to study the creep characteristics of backfill materials under different moisture contents and reveal their aging-mechanical properties, based on the Riemann-Liouville fractional calculus and damage mechanics theory, the fractional element and damage variables are introduced to improve the traditional Bingham model, and the fractional Bingham creep damage model is proposed. Based on the experimental data of gangue cemented backfill under different moisture content, the parameters of the creep model are obtained by using user-defined function fitting and the least square method. The results show that the improved Bingham fractional creep damage model can describe the whole creep process of backfill materials under different moisture contents, and the rationality of the model is verified. Compared with the traditional Bingham model, the fitting degree of the Bingham fractional creep damage model is higher, which solves the problem that the traditional Bingham model cannot describe the nonlinear creep stage. Model parameter α and ξ increase with the increase of axial stress and moisture content. Under the same moisture content, η gradually increases with the increase of axial stress. This work has a certain reference significance for studying the mechanical properties and creep constitutive model of backfill materials containing water.

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“…A multiparameter regression model is established to study the acoustic emission characteristics of coal and rocks . Meanwhile, there are examples from other fields that study mechanical properties and AE …”

Section: Introductionmentioning

confidence: 99%

“…21 Meanwhile, there are examples from other fields that study mechanical properties and AE. 22 To sum up, scholars have conducted a large number of studies on the AE characteristics of coal and rocks, but there are no reports on the AE characteristics of high-rank coal with different beddings. In this paper, an RMT-150B electrohydraulic servo rock mechanics test system and a DS5 series AE analyzer are used.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties and Acoustic Emission Characteristics of Different Bedding High-Rank Coals

Liu

Yang

et al. 2023

ACS Omega

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Bedding has an important influence on the macroscopic and microscopic mechanical properties of coal, and the mechanical properties of coal and rock mass and acoustic emission characteristics are very important for rock burst monitoring and warning. In order to explore the influence of different beddings on the mechanical properties and acoustic emission characteristics of high-rank coal, using the RMT-150B electrohydraulic servo rock mechanics test system and the DS5 acoustic emission analyzer, the uniaxial compression and acoustic emission characteristics of high-rank coals with different beddings (parallel bedding 0°, oblique bedding 30, 45, 60°, and vertical bedding 90°) were investigated. The results show that the uniaxial compressive strength and deformation modulus of vertical stratified coal samples are the largest, which are 28.924 MPa and 2.95 GPa, while the average values of uniaxial compressive strength and deformation modulus of oblique stratified coal samples are the smallest, which are 10.91 MPa and 1.776 GPa, respectively. With the increase of the bedding angle, the uniaxial compressive strength of high-rank coal decreases first and then increases. The stress−strain process of coal varies greatly with different high stratification grades (parallel bedding 0°, oblique bedding 30°, 45°, 60°and vertical bedding 90°). The loading times of parallel, oblique, and vertical beddings are 700, 450, 370, 550, and 600 s, and the acoustic emission mutation point values are 495, 449, 350, 300, and 410 s. The mutation point value can be used as precursor information to judge the failure of high-rank coal in different beddings. Research results to find the high-rank coal destruction instability prediction method and the index provide a basis; further damage to the acoustic emission testing high order coal provides reference significance; and the use of acoustic emission in the monitoring and early warning of percussive ground pressure, the bedding surface of coal, and the actual stress on site should be considered.

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Failure properties and stability monitoring of strip and column cemented gangue backfill bodies under uniaxial compression in constructional backfill mining

Cited by 16 publications

References 38 publications

Comparative Analysis of Strength and Deformation Behavior of Cemented Tailings Backfill under Curing Temperature Effect

Comparative Analysis of Strength and Deformation Behavior of Cemented Tailings Backfill under Curing Temperature Effect

Study on Bingham fractional damage model of backfill material under different moisture content conditions

Experimental Study on the Mechanical Properties and Acoustic Emission Characteristics of Different Bedding High-Rank Coals

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